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A method and device for deoxidation alloying with silicon oxide-containing materials

A deoxidation alloying technology containing silicon oxide, which is applied in the field of deoxidation alloying, can solve the problems of poor technical and economic benefits, and achieve the effects of zero emission, convenient operation, and simple device configuration

Active Publication Date: 2020-06-23
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This silicon alloy method belongs to the conventional method of alloying alloys containing elemental silicon, and the technical and economic benefits are not good.

Method used

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  • A method and device for deoxidation alloying with silicon oxide-containing materials
  • A method and device for deoxidation alloying with silicon oxide-containing materials
  • A method and device for deoxidation alloying with silicon oxide-containing materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] see figure 1 , The electrolytic reaction control device includes an anode lifting device 1 , an anode 2 , a ladle 5 , a cathode lifting device 6 , a cathode 7 and a DC power supply control device 8 . An anode lifting device 1 is arranged on the upper left side of the ladle 5; the anode lifting device 1 is equipped with high-temperature resistant metal molybdenum ceramic anodes 2, the number is 4, and the anodes 2 are inserted in the slag 3; 2. Adjust the depth of inserting the slag 3 to ensure that the anode 2 is in contact with the slag 3 and not with the molten steel 4; the other side above the ladle 5 is provided with a cathode lifting device 6, and the cathode 7 is installed on the cathode lifting device 6. The cathode 7 is a cylinder with two layers of composite structure inside and outside, the outer layer is wrapped with high temperature resistant cement, and the inside is a graphite rod; the cathode 7 is inserted into the molten steel 4; the cathode lifting devi...

Embodiment 2

[0062] The special electrolytic reaction control device of this embodiment is the same as that of Embodiment 1.

[0063] The silicon oxide-containing material used in this embodiment is wollastonite, and its composition is as shown in Table 3;

[0064] Table 3 main chemical composition of wollastonite wt%

[0065]

[0066] Apply this special electrolytic reaction control on 100t ladle for deoxidation alloying operation. The overall control process is: the weight of molten steel in the converter is 101 tons, the C content at the end of smelting is 0.071%, the oxygen content at the end of molten steel is 0.035% (percentage by weight), the temperature of molten steel at the end of smelting is 1697°C; Add wollastonite to molten steel; the amount of wollastonite added is 8Kg / ton of steel; due to the CaO / SiO in wollastonite 2 =0.9, meet the requirements, then no need to add small grains of white ash.

[0067] The electrolytic reaction control device is used to apply an electri...

Embodiment 3

[0069] The special electrolytic reaction control device of this embodiment is the same as that of Embodiment 1.

[0070] The silicon oxide-containing material used in this embodiment is high slag, and its composition is as shown in Table 4;

[0071] Table 4 Main chemical composition of high slag wt%

[0072]

[0073] Apply this special electrolytic reaction control on 100t ladle for deoxidation alloying operation. The overall control process is: the weight of molten steel in the converter is 103 tons, the C content at the end of smelting is 0.064%, the oxygen content at the end of molten steel is 0.045% (percentage by weight), the temperature of molten steel at the end of smelting is 1707°C; Add high slag to the molten steel in the middle, the addition amount is 15Kg / ton of steel; due to the high slag CaO / SiO 2 = 1.1, meet the requirements, then no need to add small grains of white ash.

[0074] The electrolytic reaction control device is used to apply an electric field ...

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Abstract

The invention relates to a method and device for conducting deoxidation alloying through a silicon oxide containing material. According to the method, silicon oxide is subjected to fusion electrolyticreduction through an electric field, and molten steel deoxidation alloying is completed. Namely, after converter steelmaking is finished, the appropriate amount of silicon oxide containing material is added into melt slag, molten steel serves as a cathode, fusion electrolytic reduction reaction of the silicon oxide is conducted by applying a direct-current electric field to the position between an inertia anode arranged in the melt slag and the cathode, silicon in the silicon oxide is reduced to enter the molten steel, the deoxidation alloying purpose is achieved, and oxygen in the silicon oxide is exhausted into the atmosphere in the oxygen gas form by being subjected to anodic reaction with the inertia anode. Through the method and the device, the silicon oxide can be subjected to fusion electrolytic reduction, surplus free oxygen in the molten steel is removed, and meanwhile, a certain content of monatomic silicon can be added into the molten steel. The device is simple in structure and convenient to operate, the low-cost efficient deoxidation alloying purpose is completed through the silicon oxide, CO2 zero emission can be achieved, the low-carbon environment friendly purposeis realized, and social and economic benefits are great.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a method and device for deoxidation alloying with materials containing silicon oxide. Background technique [0002] Deoxidation alloying is one of the basic tasks in steelmaking. In the oxygen top-blown converter, oxygen is supplied from the oxygen lance to the molten steel, which inevitably makes the final molten steel contain excess oxygen. Oxygen, whether in gaseous state, dissolved oxygen state, or in the form of oxides, will reduce the quality of steel. Therefore, after the converter smelting, the molten steel must be deoxidized and alloyed to remove excess oxygen in the molten steel. At present, the vast majority of steelmaking plants adopt a simple deoxidation alloying process, that is, add ferrosilicon, ferromanganese, silicon manganese, aluminum ingots, etc. The yield is low, the alloy consumption is large, and the steelmaking cost is high. Under the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06C25B1/00
CPCC21C7/0087C21C7/06C25B1/33Y02P10/134
Inventor 贾吉祥郭庆涛彭春霖李晓伟刘祥邹焕廖相巍张海明
Owner ANGANG STEEL CO LTD
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